This hardened-steel driver bit features a KTX #1 square tip for positive bit engagement and a quick-change compatible shank. It was designed specifically for use with the Kreg® Deck Jig™ and comes with an Allen wrench and depth collar to ensure precise depth setting. This Deck Jig™ driver bit and the KTX drill bit, which came with your Deck Jig™ are fully compatible with standard 1/4 in quick-change chucks.